Surebets from Line Movment

[ODDmaster]

Hello guys , have anyone ever tryed to get sure bets from line movment ? I'm already looking couple days in soccer,and find out that some favorite teams lines moving drastically down from opening line ,and that cause underdog and draw line move up . If you would buy favorite line at least ~12+ hours ago before match ,and buy dog and draw line just before match (when favorite already down) preety high procentage you would get "surebet" . I understand that is not that easy , but still what you think ? Is it possable to even understand line movments?

ps. I know my english sucks

ThankYou
ODDmaster